100% you will need to use the specification. It specifies what you need to know and what you don't need to know. Learn all your definitions. Use thus technique I used, it was very effective. So revise a topic thoroughly. Perhaps create a sheet "blurt" all the info on that topic. Then after a few days go past get a pen and some paper and "blurt" out everything you remember. Then cross reference it with the specification and book/resources. Fix mistakes and focus on them and add what you forgot. This is a proven technique and if you do it this early you'll probably end up with an A*.